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UNITED STATES BATENT OFFICE.

JOHN \M.DEXTER,1OE ELMIRA, NEW YORK.

LAMP.

SIECIIBICMLTIOIQ forming part of Letters Patent No. 236,996, dated January 25, 1881. Application filed October 19, 1880. (No model.)

` nary modes of 'connecting the burners to the reservoirs and the latter to the stems.

ln the drawings, Figure 1 is a sectional ele- *vation of a lamp reservoir and socket, showing myimprovement. Fig. 2 is a plan of Fig. 1 with the shield removed. Fig. 3 is an enlarged section on the line 1 2, Fig. 2; Fig. 4, a plan of the reservoir, the metal xtures being detached. Fig. 5 is a sectional viewof a moditication, and Fig. 6 a detached view Ot' the fastening-key.

The reservoir may be of -any desired material, as glass or porcelain, and of any suitable form. I however prefer to make it with a depressed top, a, so as to direct any oil which may run down from the burner toward the central orifice, x, surrounded by a iiange, b, having channels or notches e, through which the oil will descend tO the reservoir, as set forthf in a separate application for Letters Patent filed October 8,1880.

The burner-socket consists of a short tube, B, threaded internally to receive the hub of theburner, and provided with an annular eX- terior shoulder, c, having its bearing upon the edge of the iiange b; Near the lower edge of the tube are lugs f, so placed that they may be passed through the notches e on iitting the tube in its socket, the slightturnin g of the tube, after passing the same, with its lugs, through thenotches, bringing the lugs below the top of the reservoir and preventing the removal of the tube. p The shoulder c has'a notch, t, cut through it tO receive a key, D, with a large head, which key, when passed through the notch t' and one of the channels e, will hold the tube from turning and prevent its removal. rI he tube is thus fixed to the reservoir; but to secure an absolutely steady connection, as well as coverup and conceal the joint and present a more sightly and finished appearance, a shield, E, is used, consisting ot' an annular rim with a central threaded Opening adapted to threads on the tube B, or with notches and inclines, Fig. 1, which bear beneath studs m on the tube, and when themshield is turned raise the tube until the lugs f bear firmly parts are held tightly in place. g secured the tube is held in place against all attachment, the thimble against the top of the reservoir, and all the When thus forces ordinarily liable to dislodge it, while the accidents to which ordinary lamps provided with tubes cemented to the reservoir are liable cannot here occur.

The shield E, by being waved or notched at its edge, will permit the Oil falling on the top a to flow toward the channels e and back to the reservoir.

It will be apparent that the tube B may be readily removed by detaching shield E and the key D and turning the tube until the lugs f coincide with the channels e.

The thimble F, for receiving the iilling-cap, is attached in the same way, as shown in Fig. 1.

A metal thimble, J, having an external bead,is embedded in the body of metal when the reservoir is molded, thus securing a firm having internal threads adapted to those of the standard or stein which supports the reservoir.

The rim or flange b imparts steadiness to the tube B and holds it so firmly that the use of cement is dispensed with, while the notches e permit the oil on the top a to pass into the reservoir, notwithstanding this flange.

I do not claim, broadly, a notched flange combined with an attachment havin g external lugs;` but I claim- 1. The combination of the reservoir having .a burner-opening with a channeled iiange,

a tube having an external notched rib or Bange and lugs adapted to said channels, and a key adapted to the rib and to fit one of the channels, as set forth.

2. The combination of the notched reservoir, tube provided with a flange and projections f, and shield E, adapted for attachment to said tube and bearing on the reservoir, substantially as set forth.

3. The combination ot' the reservoir, tube, and shield E, screwed upon and adapted to said tube and bearing on the reservoir, substantially as set forth.

. In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN M. DEXTER.

Witnesses:

N. P. FAssE'rT, THOMAS MURRAY.

IOO 

